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I've begun oven hardening mine to get more consistant bhn. When dropping in water they can be +/- a couple bhn, when doing them in an oven they all are at the same temp and quenched at the same rate. This is mostly a way to try and squeeze that last little bit of accuracy for bullseye comp than an absolute must do. I also let bullets age harden for 2-3 weeks before loading and shooting. In approx. 2 years lead will start to soften but how much and at what rate all depends on alloy.
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